2 questions: Trigger spring and Hold open issue

[Sky Zero]

Good evening/morning ladies and gentlemen,

I figured I'd ask two questions on one thread to save some server space.

First question of two:
My newly acquired 1918 has a trigger that moves side to side quite a lot more than my '41 byf, to a point where it feels like it's clicking (until I push it back to its place). This is happening WITH the side plate on and the actual trigger pull itself has much less tension than the byf. I'm curious if this is a spring issue and requires replacement? If so, who/where is a good place to get a good replacement?

Second question:
On my '41 byf, I'm having a slight issue with the hold open. About 30-45% of the time my hold open doesn't catch on the last round; It catches every single time with an empty magazine. I'm using 2 fairly new mec-gar magazines, as well as the original FXO mag and they all have the same result. Also, I'm using Winchester White Box, my main man Mr. G.T. replaced both the extractor spring and the ejector (you're the best, GT ), and I'm unsure of whether or not the main spring has been changed. The bullets that are ejecting are hitting my head, not going far, and the brass is dented and leaving brass shavings all over the inner workings of my pistol. Also, it's clean underneath the hold open spring. Also, forgot to mention, sometimes the shells will get caught between the bolt and the breach. ONCE IN MAYBE 30 shots, the hold open will activate will some bullets still in the mag.

Any ideas?? Much appreciated, guys!

First 3 photos show the magazine inside the gun WITHOUT pushing up on the bottom.