Ya, generally if you've got a deep enough basin the sump does a fine job of keeping the water table low enough. I'd be surprised if a footing blocked the water flow, since water tables are much more pervasive that that, but that said, it could either be too shallow of a sump, or potentially just a localized high water spot (often occurs on one side of house where you have, say, the high side of a house on a hill where the uphill water is running, hitting the house and running into the ground.)
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