Fat Spike Instead of Thin on X

So I'm pretty sure this is more of a nussance than anything since I'm now able to produce a good X face on the cali cube after a series of filament tunings. The Y still had a bit of ghosting but my belts apparently weren't within 2hz of each other after checking with a belt tension site. Any idea why this IS graph is so darned fat of a spike compared to what they're supposed to be?