Website tasks and decisions that proved difficult: deciding what to fix first when tracking disagreed with itself

Website tasks and decisions that proved difficult come up constantly, but the one from the last six months that stuck with me was a tracking conflict, not a design problem. A client's Google Ads account was reporting roughly 30% more conversions than GA4 was recording for the same date range. Same website, same goal, two different numbers.

The obvious first move was to assume one tool was simply wrong. It wasn't that simple. We traced it to a GTM container firing the same conversion tag twice on the thank-you page, once on page load, once on a history-change event triggered by the site's own analytics script. Every form submission that triggered a client-side redirect was getting counted twice in Ads, while GA4's deduplication logic was quietly filtering it out. Two systems, two different truths, both technically 'working'.

The decision that was actually hard wasn't the fix, removing the duplicate trigger took an afternoon. It was deciding how far back to distrust the data. Do you flag the last week of Ads reporting as unreliable? The last month? Do you tell the client their recent cost-per-lead was never what it looked like? We settled on auditing the previous 60 days of conversion data against GA4 session-level events manually, then correcting the client's reporting dashboard with a note on the date the fix went live, rather than quietly smoothing over the discrepancy.

What was left unanswered, and still bothers me: how many other accounts have this exact duplicate-fire pattern and nobody's checked because the numbers looked plausible? There's no routine audit most teams run for this, it only surfaces when someone notices a gap between two platforms that are supposed to agree. That's an uncomfortable amount of trust to place in tools that rarely get cross-checked against each other.

If your conversion numbers in Ads and analytics don't match and nobody's explained why, that's worth investigating before you make another budget decision based on either one. Jordan James Media can take a look at the setup.