Calender date links not aligning

I’m having troubles with a design I’m working on. I can’t seem to get the date links in the calender to line up in Firefox. When I view the page in IE, the dates all line up fine but in Firefox, the dates that have posts are bumped down from the rest of the dates, and it looks pretty terrible.

https://simlair.com/design2

Does anyone know how I can fix this? I’ve combed through the css and can’t figure out how this happening. Thanks in advance for any help, it is MUCH appreciated.