silver,
i have reviewed #911 and some of the ensuing posts. i will give you my 2 cents and you can do with it as you please.
you are having some layout issues. in an attempt to resolve your layout issues you have downloaded some new jquery functions. so in reference to my original post, i will take back my statement as to whether removing the file will cause your problem to go away, i do not know. you can try and find out. i thought this jscript_matchHeight-min was supposed to help resolve the issue you were having; but right now, it is not loading and therefore you do not know if it will help or not.
my suggestion to post the code for that script was to help resolve the issue with getting those functions to load so you can see if they will help solve your original problem. which is what i was attempting to help you with. now, if what you really want is help with layout, let me tell you where i would start:
i would first validate your html.
you can not start playing around with css and layout until your html validates and right now your home page has 29 errors and 2 warnings. most of these are not worrisome, but you have two of these errors:
end tag for "ul" which is not finished
stray tags will wreak havoc on your layout, and i fix all necessary html prior to looking at any css layout issues. but that's me, and i do not offer layout advice if the html does not validate. i have found validating one's html ends up being a good learning experience. even if the validation ends up being not related to the layout. (and perhaps those two stray tags are nothing..... but still...)
you can learn and validate your html at this site:
https://validator.w3.org/
now, the next thing i look for is console errors. you need to open the developer tools (press f12 when using chrome or firefox) and then look at the errors (if any exist) on the console. you have 2 on the pages that i looked at. i am as close to 100% that those console errors related to jquery not being defined and Height not being a function can be resolved by looking at the load order established in html_header.php
after those 2 things get resolved, i then look at layout. but understand you are making use of a responsive template, so that template looks different based on the size of your viewport (essentially your screen size). and i doubt you want 3 items/row when someone is looking at your site on an iPhone 5.... or maybe you do...
as you say, i am late to the party, which i acknowledge, but i was only attempting to help with errors easily seen on your site and which, to me, need resolution, prior to looking at your layout issues.
best.