How to release and re-summon a trust?

This is just my first day writing addons so I know my code can use a lot of cleanup. Right now I'm checking for trust's current mp, then I want to release and re-summon them if their mp is below a certain threshold (90% just for testing). I'm getting them to release, but it won't re-summon them. Any idea what's wrong?

_addon.command = 'fedex'

windower.register_event('addon command',function()
	local party = windower.ffxi.get_party()
	if party.p4 ~= nil then
		local mpp	= party.p4.mpp
		local name	= party.p4.name
		if mpp ~= 0 and mpp < 90 then
			windower.send_command('input /refa '..name..';wait 1;/ma '..name..' <me>')
		end
	end
	if party.p3 ~= nil then
		local mpp	= party.p3.mpp
		local name	= party.p3.name
		if mpp ~= 0 and mpp < 90 then
			windower.send_command('input /refa '..name..';wait 1;/ma '..name..' <me>')
		end
	end
end)

Also, how do I get the first if statement to wait to finish before the second one runs? Right now if both trusts have low mp only 1 will release for each time I run the command.

There are a few ways to do this, but the simplest is probably something like this:

local party = windower.ffxi.get_party()
if party.p4 ~= nil then
    local mpp = party.p4.mpp
    local name = party.p4.name
    if mpp ~= 0 and mpp < 90 then
        windower.send_command('input /refa ' .. name)
        coroutine.sleep(1)
        windower.send_command('input /ma ' .. name .. ' <me>')
        coroutine.sleep(3.5) -- may need to adjust this delay
    end
end
if party.p3 ~= nil then
    local mpp = party.p3.mpp
    local name = party.p3.name
    if mpp ~= 0 and mpp < 90 then
        windower.send_command('input /refa ' .. name)
        coroutine.sleep(1)
        windower.send_command('input /ma ' .. name .. ' <me>')
        coroutine.sleep(3.5) -- ditto
    end
end

Note that this will fail if p3 or p4 are not trusts. A more robust solution is something like this:

local party = windower.ffxi.get_party()
local first = true
for i = 1, 5 do
    local member = party['p' .. i]
    if member and member.mob and member.mob.is_npc and member.mp ~= 0 and member.mpp < 90 then
        if not first then
            coroutine.sleep(3.5) -- may need to adjust this delay
        end
        first = true
        windower.send_command('input /refa ' .. member.name)
        coroutine.sleep(1)
        windower.send_command('input /ma ' .. member.name .. ' <me>')
    end
end

Improving on this further would likely require using packets to detect when casting finishes.

Can also use windower.chat.input instead of windower.send_command. The former is used for entering FFXI commands, the second is used for entering Windower commands. Since you're sending FFXI commands, the first is more appropriate. It won't make much of a difference, it just makes your intent clearer, which makes the code easier to read.