I recently purchased a glock 27 to add to my collection as an additional carry option. My wife didn't like the fact that it didn't have a safety so i ordered a trigger made by siderlock that had a safety built in to apease her. I changed the trigger exactally like the video said and I'm having some issues. When I put a full 9 round mag in and rack the slide the slide stays locked back as if the last round were fired. I try to pull the slide back and load a round and it wont work. If I have 8 rounda in the mag everything works normal. Has anyone else installed this trigger? I tried 3 different mags and they all gave me problems when they had 9 rounds in them. Can anyone help me please?